A
What is the force that keeps planets in orbit around the sun?
gravitational force
Which tool do astronomers primarily use to study distant stars?
telescopes
How many planets orbit the sun?
8 planets
During which season is the sun's path the highest?
summer
How does a shadow at 5:00 p.m. compare to a shadow at 12:00 p.m.?
The shadow is longer at 5:00 p.m.
Why do we experience night and day?
Earth's rotation
How does gravity affect a ball thrown straight up in the air?
The ball will eventually fall back down.
How would Earth be affected if it were closer to the sun?
It would be too hot to live on Earth.
During which season is the sun's path the lowest?
winter
What season is it in the Northern Hemisphere when Earth's axis is tilted towards the sun?
What causes objects to fall toward Earth's surface?
gravity
Due to Earth's rotation, during the day, which pattern can we observe in the sky?
The sun appears to move across the sky from east to west.
How would Earth be affected if it were farther from the sun?
It would be too cold to live on Earth.
During what part/parts of the day are shadows the longest?
sunrise and sunset
What season is it in the Northern Hemisphere when Earth's axis is tilted away from the sun?
winter
How long does it take for Earth to make one complete rotation on its axis?
24 hours
How would your weight change if you were on the moon?
You would weigh less on the moon.
Arrows around Earth showing it spinning represent which of Earth's movements?
Earth's rotation
When the sun is low in the horizon, the length of the shadow is ________.
long
What season(s) is it when Earth's axis is not pointed towards or away from the sun?
spring and fall
What is the brightest star visible from Earth?
the sun
What characteristic determines a star's brightness as seen from Earth?
A star's brightness is determined by its distance from Earth.
Arrows around a planet following an oribt represent which of Earth's movements?
Earth's revolution
As the sun rises the shadow gets __________ until noon, when it starts to get longer.
shorter
true